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- Title
A new three-tier architecture design for multi-sphere neutron spectrometer with the FLUKA code.
- Authors
Huang, Hong; Yang, Jian-Bo; Tuo, Xian-Guo; Liu, Zhi; Wang, Qi-Biao; Wang, Xu
- Abstract
The current commercially, available Bonner sphere neutron spectrometer (BSS) has high sensitivity to neutrons below 20 MeV, which causes it to be poorly placed to measure neutrons ranging from a few MeV to 100 MeV. The paper added moderator layers and the auxiliary material layer upon 3He proportional counters with FLUKA code, with a view to improve. The results showed that the responsive peaks to neutrons below 20 MeV gradually shift to higher energy region and decrease slightly with the increasing moderator thickness. On the contrary, the response for neutrons above 20 MeV was always very low until we embed auxiliary materials such as copper (Cu), lead (Pb), tungsten (W) into moderator layers. This paper chose the most suitable auxiliary material Pb to design a three-tier architecture multi-sphere neutron spectrometer (NBSS). Through calculating and comparing, the NBSS was advantageous in terms of response for 5-100 MeV and the highest response was 35.2 times the response of polyethylene (PE) ball with the same PE thickness.
- Subjects
NEUTRON spectrometers; BONNER sphere spectrometers; MODERATORS (Fission reactors); HELIUM; ARCHITECTURAL design; POLYETHYLENE
- Publication
Modern Physics Letters B, 2016, Vol 30, Issue 19, p-1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984916502353